Floating frame for reduction of road vibration



March 22, 1932.

A. SCHNEIDER FLOATING FRAME FOR REDUCTION OF ROAD VIBRATION Filed May 9,19 29 Patented Mar. 22, 1932 I NETE ANTON scrmnrnnn, or ESCHELBACH,BADEN, GERMANY FLOATING FRAME FOR nnnocrlon OF'BOAD VIBRATIONApplication filed May 9, 1929, Serial No. 3fi l,,76, a nd in Germany May18, 1928".

Present methods of road construction,

whose substructure consists of layers of road metal, concrete, stonesand similar material, have the disadvantage, that the vibration cause onthe surface of the road by heavy passing vehicles, coupled with therecurring seasonal swelling and sinking of the earth fort to theoccupiers of the dwellings thus shaken and cracked.

By this invention such defects are greatly reduced or entirelyeliminated. Wedgeshaped rib supports movably connected with each otherare arrangedin the longitudinal direction of the road below the cover ofthe road. These supports are like rails arranged at. equal distancesapart parallel to each other and connected with the road surface. Bythis arrangement, which is like a floating street frame the shearingforces of rolling loads are absorbed and the vibrations are thus reducedor done away with, the vibration waves being distributed over a greatstreet length where the last outrunners of the shearing forces terminatein the points of the wedge-shaped rib supports.

Presumbly no vibration coming from the road will shake the buildings oneither side of it, because the shearing forces in the road bed arecarried along the longitudinal direction and are thus prevented fromexerting any lateral effect.

The supports are ribs joined one to the other as high webs, the lowerparts of said webs being waved, serrated, straight or of other shape,and automatically dig themselves into the ground like long roots.

Thus earth-channels are formed within the solid rib frames within whichthe expanding and contracting earth masses can spend their effectswithout influencing the road surface.

An embodiment of the invention is illustrated b way of example in theaccompany ing drawings in which: Fig. 1 shows a side view of therib-like supt i Fig.:2'is a cross section through the highest rib-pointof each rod. F ig. 3 shows in top plan View the support asit liesin theground. j

Fig. 4 shows a. means of-connecting two supports; Fig. 5 shows in topplan view a complete support element without enlarged head jointas'may'be used for fiX'edin roads. Fig. (Sis a cross-section of a roadthe embedded supports. The faces a, a and a of the end a serve as aconnection piece and b the surfacesb, Z2 b and Z9 on the end 6 of thesupport serve as howing beds and abutments for twoadjoiningsupportsfwhichmutually take up the shearing forces whichconverge from the road surface.

The head end I) of one support is inserted in the recesses f and f inthe head of the preceding support and secured in position by means of atie rod 0 and bolts d. The end 6 of the adjoining support rests securelybetween the arms f 7, f, 7, which also positively prevent any shiftingin lateral direc tion.

The support ribs 9 penetrating into the ground as shown in Figs. 2 and6, may be v wave-shaped as shown by the curve g, serrated or of othersuitable shape according to the nature of the ground. They are firmlyconnected to the road covering 9 as shown in Fig. 6. j The road surfacecoveringmay be made in one piece, or composed of several sections.

I claim 1. A vehicle road construction comprising a concrete road bed, aplurality of ribs integral with said road bed, embedded in thesubstructure, extending lengthwise of the road, and spaced aparttransversely of the road intermediate of the side edges of the latter,each of said ribs being formed of concrete sections wedge-shaped invertical transverse section whereby they may dig them selves into thesubstructure when subjected to vehicle shocks, the end of each sectionoverlapping the adjacent end of the next section, and the depth of eachrib being greater at its end than at an intermediate point, and ofgreater depth than the spacing between adj acent ribs, and a tie rodextending lengthwise of each section, said tie rods being securedtogether at said overlapping ends.

2. A vehicle road construction comprising a concrete road bed, aplurality of comparatively deep concrete ribs integral with said roadbed and embedded in the substructure, said ribs extending lengthwise ofthe road and spaced apart transversely of the road intermediate of theside edges of the latter, each of said ribs being wedge-shaped invertical transverse section whereby they may dig themselves into thesubstructure when subjected to vehicle shocks, and being formed ofconcrete sections interlinked at their ends, androds extending betweenthe jointure of the interlinked sections to effect a vertically flexiblejoint between adjoining rib sections.

8. A vehicle road construction comprising a concrete road bed, and aplurality of ribs integral with said road bed and embedded in thesubstructure, said ribs being wedgeshaped in vertical transverse sectionin such a way as to permit them to dig themselves into the substructurewhen subjected to vehicle shocks, and extending lengthwise of the roadand spaced apart transversely of the road intermediate of the side edgesof the latter, each of said ribs being formed of concrete sectionsinterlinked at their ends.

In testimony whereof I affix my signature.

ANTON SCHNEIDER.

